Silver-plated copper-aluminum alloy wire and compression roller equipment

Abstract

The invention provides a silver-plated copper-aluminum alloy wire and compression roller equipment, on one hand, the silver-plated copper-aluminum alloy wire is structurally characterized in that the silver-plated copper-aluminum alloy wire comprises an alloy wire body, and the alloy wire body is sequentially provided with a copper-aluminum composite core layer, a nickel transition layer and a silver-plated layer from inside to outside; and the cross section of the copper-aluminum composite core layer is rectangular. The invention belongs to the technical field of silver-plated copper-aluminum alloy wire processing, and particularly relates to a silver-plated copper-aluminum alloy wire and compression roller equipment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of silver-plated copper-aluminum alloy wire rolling processing, and particularly relates to a silver-plated copper-aluminum alloy wire and a compression roller device. BACKGROUND

[0002] With the rapid development of high-end technical fields such as 5G communication, aerospace and new energy vehicles, the performance requirements for conductive materials are increasingly improved. In the prior art, the silver-plated copper-aluminum alloy wire and related processing equipment have the following deficiencies: 1. In terms of alloy wire structure, due to the limitation of production process precision, traditional wires are mostly made of single metal material or simple composite structure, and it is difficult to balance the conductivity, lightweight and corrosion resistance. Although pure copper wire has excellent conductivity, it is heavy and high in cost, and is not suitable for weight-sensitive fields; the copper-aluminum composite wire is often subject to interface electrochemical corrosion, resulting in performance degradation, weak adhesion between the plating layer and the substrate, and easy peeling of the silver layer, affecting the conductivity stability; at the same time, most wires adopt a circular cross section, and the bending resistance is limited under the same cross-sectional area, which is difficult to meet the wiring needs of precision electronic devices. 2. In terms of processing equipment, due to the limitation of the compression roller device, the traditional equipment mostly adopts a separate design for processing alloy wires with circular and square cross sections, and needs to be equipped with two independent devices for separate operation, which not only increases the equipment investment cost, but also leads to low processing efficiency due to frequent process conversion. And the existing compression roller mechanism often causes wire cracking or plating layer peeling due to excessive single deformation, and the subsequent wire drawing forming precision is insufficient, the error accumulation between processes is serious, and the product qualification rate is low. 3. In terms of wire processing cooling, the existing cooling system mostly adopts open water supply, which seriously wastes water resources, and the cooling contact area is limited, which is difficult to effectively control the processing temperature, and the silver-plated layer is often oxidized and discolored or the copper-aluminum composite core layer produces thermal stress cracks due to high temperature, affecting the consistency and stability of product performance. SUMMARY

[0003] In order to solve the problems of alloy wire structure defects, low processing equipment efficiency and insufficient efficiency of the cooling system, the application provides a silver-plated copper-aluminum alloy wire and a compression roller device. Among them: In a first aspect, the application provides a silver-plated copper-aluminum alloy wire, which has the following structure: The silver-plated copper-aluminum alloy wire comprises an alloy wire body, the alloy wire body is sequentially provided with a copper-aluminum composite core layer, a nickel transition layer and a silver plating layer from inside to outside, and the cross section of the copper-aluminum composite core layer is rectangular.

[0004] Further, the side length of the cross section of the copper-aluminum composite core layer is 2-3 mm; The nickel transition layer is tightly covered on the outer periphery of the copper-aluminum composite core layer, the thickness is 6-10 μm, and a metallurgical bonding layer is formed between the nickel transition layer and the copper-aluminum composite core layer, the thickness of the metallurgical bonding layer is 1.5-3 μm; The silver plating layer is tightly covered on the outer periphery of the nickel transition layer, the purity is 99.99%, the thickness is 4-7 μm, and a diffusion bonding layer is formed between the silver plating layer and the nickel transition layer, the thickness of the diffusion bonding layer is 0.8-1.5 μm.

[0005] In the second aspect, the application provides a silver-plated copper-aluminum alloy wire pressure roller device for processing the silver-plated copper-aluminum alloy wire, and the structure is as follows: The pressure roller device comprises a bottom plate, a side support plate, a guide mechanism and a pressure roller mechanism, and the side support plate is vertically fixed on the bottom plate; A wire drawing box is arranged on the bottom plate, a wire drawing mechanism is arranged on the wire drawing box, and a water circulation mechanism is connected to the outer side of the wire drawing box.

[0006] Further, the pressure roller mechanism comprises a circular pressure roller mechanism and a square pressure roller mechanism, the circular pressure roller mechanism is arranged on one side of the side support plate, and the square pressure roller mechanism is arranged on the other side of the side support plate; The circular pressure roller mechanism comprises a plurality of groups of horizontal circular pressure roller assemblies and a plurality of groups of vertical circular pressure roller assemblies; The horizontal circular pressure roller assembly comprises a square frame two fixed on the side of the side support plate, a servo motor two symmetrically fixed in the square frame two, a circular horizontal pressure roller driven by the servo motor two and a support plate one connected to the outer end of the circular horizontal pressure roller, the bottom end of the support plate one being fixed on the bottom plate, and the output shaft of the servo motor two penetrating through the square frame two; The vertical circular pressure roller assembly comprises a square frame three fixed on the top of the bottom plate, a servo motor three symmetrically fixed in the square frame three, a circular vertical pressure roller driven by the servo motor three and a support plate two connected to the outer end of the circular vertical pressure roller, the bottom end of the support plate two being fixed on the side support plate, and the output shaft of the servo motor three penetrating through the square frame three; The horizontal circular pressure roller assembly and the vertical circular pressure roller assembly are alternately arranged along the direction of the alloy wire, the clamping spacing between the horizontal circular pressure rollers in the horizontal circular pressure roller assembly and the clamping spacing between the vertical circular pressure rollers in the vertical circular pressure roller assembly gradually decrease along the direction of the alloy wire, so that the gradual pressure bonding is realized.

[0007] Further, the square pressure roller mechanism comprises a plurality of groups of square horizontal pressure roller assemblies and a plurality of groups of square vertical pressure roller assemblies; The square horizontal pressure roller assembly comprises a square frame four fixed on the side of the side support plate, a servo motor four symmetrically fixed in the square frame four, a square horizontal pressure roller driven by the servo motor four and a support plate three connected to the outer end of the square horizontal pressure roller, the bottom end of the support plate three being fixed on the bottom plate, and the output shaft of the servo motor four penetrating through the square frame four; The square vertical compression roller assembly comprises a square frame five fixed on the top of the bottom plate, a servo motor five symmetrically fixed in the square frame five, and a square vertical compression roller driven by the servo motor five, and an output shaft of the servo motor four penetrates through the square frame four; The square horizontal compression roller assembly and the square vertical compression roller assembly are alternately arranged along the alloy wire running direction; the clamping spacing between the square horizontal compression rollers in the square horizontal compression roller assembly and the clamping spacing between the square vertical compression rollers in the square vertical compression roller assembly gradually decrease along the alloy wire running direction, so as to realize progressive compression.

[0008] Further, the middle part of the square horizontal compression roller, the circular horizontal compression roller and the square vertical compression roller is provided with an arc-shaped groove extending along the circumferential direction thereof; the middle part of the square horizontal compression roller is provided with a compression roller belt extending along the circumferential direction thereof.

[0009] Further, the guide mechanism comprises a square frame one symmetrically arranged on the top of the bottom plate, a plurality of groups of servo motors one and two rows of guide roller groups symmetrically fixed in the square frame one, an output shaft of the servo motor one penetrates through the square frame one, the guide roller group is driven by the corresponding servo motor one, and the guide roller group is symmetrically arranged; Among them, the alloy wire passes between the two rows of guide roller groups, and the corresponding guide rollers in the two rows of guide roller groups are arranged obliquely to form a guide channel for the alloy wire, and a guide groove is formed on the guide roller.

[0010] Further, the wire drawing mechanism comprises a rotating motor fixed on the outside of the wire drawing box body, a bidirectional lead screw rotatingly arranged in the wire drawing box body, a lead screw pair one, a lead screw pair two, a square wire drawing piece and a circular wire drawing piece, the lead screw pair one and the lead screw pair two are respectively threadedly connected at both ends of the bidirectional lead screw, a sliding rod parallel to the bidirectional lead screw is fixedly arranged in the wire drawing box body, the lead screw pair one and the lead screw pair two are respectively slidingly arranged at both ends of the sliding rod, and L-shaped rods are symmetrically fixed on the top of the lead screw pair one and the lead screw pair two; The square wire drawing piece is composed of two groups of symmetrically arranged half-rectangular tapered cylinders to form a rectangular tapered cylinder, one group of the half-rectangular tapered cylinders is fixed on the inside of the wire drawing box body, and the other group is fixed on one group of the L-shaped rods; The circular wire drawing piece is composed of two groups of symmetrically arranged half-circular tapered cylinders to form a circular tapered cylinder, one group of the half-circular tapered cylinders is fixed on the inside of the wire drawing box body, and the other group is fixed on the remaining L-shaped rods.

[0011] Further, the inner diameters of the rectangular tapered cylinder and the circular tapered cylinder gradually decrease along the alloy wire running direction; The inside of the wire drawing box body is symmetrically provided with a side guide roller, and the wire drawing box body is symmetrically provided with a through hole.

[0012] Further, the water circulation mechanism comprises a water cooler fixed on the top of the bottom plate, a water inlet pipe with a valve and a water outlet pipe with a valve. The water inlet pipe is connected with the bottom of the drawing box body at one end and with the water inlet of the water chiller at the other end. The water outlet pipe is connected with the water outlet of the water chiller at one end and is fixed to the top of the drawing box body at the other end.

[0013] Compared with the prior art, the present application adopts the above structure and has the following beneficial effects: 1. The structure of the silver-plated copper-aluminum alloy wire realizes comprehensive optimization of performance. The copper-aluminum composite core layer maintains the high conductivity of copper while reducing the weight of the wire by 35% compared with pure copper, which is suitable for weight-sensitive fields; the nickel transition layer forms a metallurgical bonding layer with the copper-aluminum core layer, effectively blocking the electrochemical corrosion of copper-aluminum and prolonging the service life of the wire; the silver-plated layer is atomically combined with the nickel layer through a diffusion bonding layer, preventing the silver layer from peeling off and ensuring long-term stable conductivity; the copper-aluminum composite core layer with a rectangular cross-section provides higher bending resistance than the traditional circular cross-section under the same cross-sectional area, which is suitable for precise electronic device wiring.

[0014] 2. The cooperation of the circular compression roller mechanism, the square compression roller mechanism and the drawing mechanism greatly improves the precision and efficiency of alloy wire processing. The circular compression roller mechanism and the square compression roller mechanism are integrated in the same device and can be flexibly switched according to demand, realizing the integrated processing of circular and square compression rollers, without the need for separate devices and operations as in traditional technology, reducing equipment investment and process conversion time; the circular compression roller mechanism gradually reduces the distance between the compression rollers, slowly deforming the wire from the initial shape to an approximate circular shape, avoiding cracking or peeling of the plating layer caused by excessive deformation at one time, and then accurately shaping through the circular taper cylinder of the drawing mechanism; the square compression roller mechanism realizes accurate shaping of the square cross-section through progressive compression and rectangular taper cylinder drawing based on the same principle; compared with the separate processing method in the prior art, the present application reduces the error accumulation between processes, improves the product pass rate, and improves the production efficiency through the integrated processing flow.

[0015] 3. The cooperation of the side guide roller and the water circulation mechanism ensures the stability of the processing process and the quality of the product. The side guide roller ensures that the alloy wire travels straight along the axial direction during the drawing process, avoiding processing errors caused by deflection; the water circulation mechanism forms a closed loop circulation system, which can efficiently recycle water resources, saving more water resources compared with traditional open water supply, and the water flow can partially immerse the cable in the water tank type drawing box, increasing the cooling contact area and improving the cooling effect, controlling the processing temperature within a suitable range, preventing the silver-plated layer from oxidizing and discoloring due to high temperature and the copper-aluminum composite core layer from producing micro-cracks due to thermal stress. The cooperation of the two solves the problem of unstable product quality caused by wire deflection and temperature loss of control in the prior art, improving the consistency of product performance. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 2 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 1 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 3 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 4 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 1 Figure 5 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 2 Figure 6 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 7 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 8 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 7 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 9 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. Figure 10 A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1.

[0017] A schematic diagram of the overall structure of a silver-plated copper-aluminum alloy wire according to the present application is shown in FIG. 1. DETAILED DESCRIPTION

[0018] ​​The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] Unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The present application will be further described in detail below in connection with the drawings.

[0021] As shown in Figures 1-10 The present application provides a silver-plated copper-aluminum alloy wire and a compression roller device: Embodiment 1

[0022] As shown in Figures 1-3 The present application provides a silver-plated copper-aluminum alloy wire, which has the following structure: The silver-plated copper-aluminum alloy wire comprises an alloy wire body 1, which is provided with a copper-aluminum composite core layer 11, a nickel transition layer 12 and a silver-plated layer 13 from inside to outside, and the cross section of the copper-aluminum composite core layer 11 is rectangular. The rectangular cross section structure improves the bending resistance of the silver-plated copper-aluminum alloy wire, and is suitable for precise electronic device wiring.

[0023] As shown in Figures 1-3As shown, the side length of the cross-section of the copper-aluminum composite core layer 11 is 2-3 mm; the nickel transition layer 12 tightly covers the outer periphery of the copper-aluminum composite core layer 11, with a thickness of 6-10 μm, and a metallurgical bonding layer is formed between the nickel transition layer 12 and the copper-aluminum composite core layer 11, with a thickness of 1.5-3 μm, which blocks the electrochemical corrosion of the copper-aluminum interface and provides a stable adhesion substrate for the outer silver plating. The nickel transition layer 12 is deposited on the surface of the copper-aluminum composite core layer 11 using a magnetron sputtering process to ensure that the nickel transition layer 12 is uniformly and densely covered on the outer periphery of the copper-aluminum composite core layer 11. The nickel transition layer 12 also provides an excellent adhesion base for the subsequent silver plating layer 13, further improving the stability of the overall structure.

[0024] A silver plating layer 13, with a purity of 99.99% and a thickness of 4-7 μm, tightly covers the outer periphery of the nickel transition layer 12. A diffusion bonding layer with a thickness of 0.8-1.5 μm is formed between the silver plating layer 13 and the nickel transition layer 12. This diffusion bonding layer forms an atomic-level bond with the nickel layer, and the low contact resistance of silver enhances conductivity. The three-layer structure synergistically optimizes the alloy wire's strength, corrosion resistance, and conductivity. A high-purity silver plating layer 13 is deposited on the surface of the nickel transition layer 12 through an electroplating process. The electroplating parameters are controlled to ensure that the silver plating layer 13 has a uniform thickness and a smooth surface. The diffusion bonding layer between the silver plating layer 13 and the nickel transition layer 12 achieves atomic-level bonding, greatly enhancing the adhesion of the silver plating layer 13 and preventing it from peeling off during subsequent processing or use. The low contact resistance of the silver plating layer 13 further improves the conductivity of the wire. The synergistic optimization of the three-layer structure achieves a balance of high strength, high corrosion resistance, and high conductivity. Example 2

[0025] like Figures 4-10 As shown, the present invention provides a silver-plated copper-aluminum alloy wire pressure roller device for processing the above-mentioned silver-plated copper-aluminum alloy wire, the structure of which is as follows: The pressure roller device 2 includes a base plate 21, a side support plate 22, a guide mechanism 3, and a pressure roller mechanism. The side support plate 22 is vertically fixed on the base plate 21. The guide mechanism 3 is used to correct the direction of the wire. The pressure roller mechanism includes a circular pressure roller mechanism 4 and a square pressure roller mechanism 5. The circular pressure roller mechanism 4 is located on one side of the side support plate, and the square pressure roller mechanism 5 is located on the side support plate. The circular pressure roller mechanism 4 and the square pressure roller mechanism 5 achieve preliminary forming of the alloy wire cross-section through progressive pressing. The guide mechanism 3 adopts a guide roller group 33 driven by multiple servo motors 32. Before entering the pressure roller mechanism, the wire passes through the guide roller 34 for correction, ensuring that the wire always travels in a straight line along the axial direction and avoiding pressing errors caused by skewness. The circular pressure roller mechanism 4 and the square pressure roller mechanism 5 gradually change the shape of the wire cross-section through alternating progressive pressing, avoiding cracking or coating peeling caused by excessive deformation in a single operation, and improving forming accuracy and product qualification rate.

[0026] The bottom plate 21 is provided with a drawing box 6, and the drawing box 6 is provided with a drawing mechanism 7 to complete the size finishing of the alloy wire. The outer side of the drawing box 6 is connected with a water circulation mechanism 8, and the water circulation mechanism 8 controls the processing temperature to avoid the deterioration of the material performance. The drawing mechanism 7 adopts a rotary motor 71 to drive a bidirectional screw rod 72, cooperates with a rectangular tapered cylinder 751 and a circular tapered cylinder 761, and realizes the finishing drawing of the wire with different sections. In the drawing process, the water circulation mechanism 8 provides low-temperature water through a water chiller 81, the water fully contacts with the wire through the drawing box 6, takes away the processing heat, and prevents the oxidation discoloration of the silver plating layer 13 and the thermal stress cracks of the copper-aluminum composite core layer 11 caused by high temperature.

[0027] As Figure 4 , 6As shown in Figure 9, the circular pressure roller mechanism 4 includes several sets of horizontal circular pressure roller assemblies 41 and several sets of vertical circular pressure roller assemblies 42; the horizontal circular pressure roller assembly 41 includes a second square frame 411 fixed to the side of the side support plate 22, a second servo motor 412 symmetrically fixed in the second square frame 411, a circular horizontal pressure roller 413 driven by the second servo motor 412, and a first support plate 414 connected to the outer end of the circular horizontal pressure roller 413. The bottom end of the first support plate 414 is fixed to the base plate 21, and the output shaft of the second servo motor 412 passes through it. The second frame 411 is set; the vertical circular pressure roller assembly 42 includes a third frame 421 fixed to the top of the base plate 21, a third servo motor 3 symmetrically fixed in the third frame 421, a circular vertical pressure roller 422 driven by the third servo motor 3, and a second support plate 423 connected to the outer end of the circular vertical pressure roller 422. The bottom end of the second support plate 423 is fixed to the side support plate 22. The output shaft of the third servo motor 3 is set through the third frame 421. The horizontal pressure roller is driven by the second servo motor 412 and is fixed to the first support plate 414 through the second frame 411. The fixed structure forms pressure output points in the vertical direction; the vertical pressure roller is driven by a servo motor and forms pressure output points in the left and right direction through the fixed structure of the square frame 421 and the support plate 423. The spatial layout of the two sets of pressure roller assemblies realizes omnidirectional wrapping and pressing of the wire; the horizontal circular pressure roller assembly 41 and the vertical circular pressure roller assembly 42 are arranged alternately along the direction of alloy wire travel. The clamping distance between the horizontal circular pressure rollers in the horizontal circular pressure roller assembly 41 and the clamping distance between the vertical circular pressure rollers in the vertical circular pressure roller assembly 42 decreases sequentially along the direction of alloy wire travel to achieve progressive pressing and avoid wire cracking due to excessive deformation in a single operation. This is suitable for the initial forming of circular cross-sections; the arc groove 53 in the middle of the circular horizontal pressure roller 413 and the circular vertical pressure roller 422 is in contact with the surface of the wire, so that the pressure is evenly distributed along the circumference and avoids wire cracking or coating peeling due to excessive deformation in a single operation. This is suitable for the initial forming of circular cross-sections, further improving the forming quality and ensuring high consistency of wire cross-section dimensions and surface quality. The clamping distance between the horizontal circular pressure roller assembly 41 and the vertical circular pressure roller assembly 42 is designed to decrease gradually, so that the wire is subjected to uniform force during the journey and the deformation process is smooth, which greatly reduces the risk of structural damage caused by stress concentration.

[0028] like Figures 4-6 As shown, the square pressure roller mechanism 5 includes several sets of square horizontal pressure roller assemblies 51 and several sets of square vertical pressure roller assemblies 52; the square horizontal pressure roller assembly 51 includes a square frame 4 511 fixed to the side of the side support plate 22, a servo motor 4 symmetrically fixed in the square frame 4 511, a square horizontal pressure roller 512 driven by the servo motor 4, and a support plate 3 513 connected to the outer end of the square horizontal pressure roller 512. The bottom end of the support plate 3 513 is fixed to the base plate 21, and the output shaft of the servo motor 4 is set through the square frame 4 511. The square vertical compression roller assembly 52 includes a square frame five 521 fixed on the top of the bottom plate 21, a servo motor five symmetrically arranged in the square frame five 521, and a square vertical compression roller 522 driven by the servo motor five. The output shaft of the servo motor four penetrates the square frame four 511. The square horizontal compression roller 512 is driven by the servo motor four to apply pressure to the wire in the up-down direction to control the cross-sectional height. The square vertical compression roller 522 is driven by the servo motor five to apply pressure to the wire in the left-right direction to constrain the cross-sectional width. The two work together to achieve multi-axial synchronous compression of the rectangular cross-section. The square horizontal compression roller assembly 51 and the square vertical compression roller assembly 52 are arranged alternately along the alloy wire running direction. The clamping spacing between the square horizontal compression rollers 512 in the square horizontal compression roller assembly 51 and the clamping spacing between the square vertical compression rollers 522 in the square vertical compression roller assembly 52 decrease successively along the alloy wire running direction, so as to realize progressive compression and match the plastic deformation characteristics of the copper-aluminum composite core layer 11. The compression surfaces of the square horizontal compression roller 512 and the square vertical compression roller 522 are in close contact with the rectangular cross-section of the wire. Through the continuous action of multiple groups of compression rollers, the cross-section of the wire gradually approaches the target size from the approximate square shape, ensuring the dimensional accuracy and corner integrity during the forming process, improving the yield and surface quality of the square cross-section wire, and reducing the subsequent finishing process.

[0029] As shown in Figures 4-6 The middle part of the square horizontal compression roller 512 is provided with a compression roller belt 54 extending along the circumference thereof for compressing, clamping and guiding the alloy wire.

[0030] As shown in Figures 4-6 The guide mechanism 3 includes a square frame one 31 symmetrically arranged on the top of the bottom plate 21, a plurality of groups of servo motors one 32 symmetrically arranged in the square frame one 31, and two rows of guide roller groups 33. The output shaft of the servo motor one 32 penetrates the square frame one 31. The guide roller group 33 is driven by the corresponding servo motor one 32 and is symmetrically arranged. The alloy wire passes between the two rows of guide roller groups 33, and the corresponding guide rollers 34 in the two rows of guide roller groups 33 are arranged obliquely to form a guide channel for the alloy wire. The guide groove 341 is formed on the guide roller 34 for passing the alloy wire. When the alloy wire passes between the guide channels, the guide roller 34 applies a symmetric lateral force to the wire through the synchronous speed control of the servo motor one 32 to correct the bending or deviation of the wire caused by the previous processing, ensuring the positioning accuracy during the subsequent compression roller processing.

[0031] As shown in Figures 4-8As shown, the drawing mechanism 7 includes a rotating motor 71 fixed to the outside of the drawing box 6, a bidirectional screw rod 72 rotatingly arranged in the drawing box 6, a screw rod pair one 73, a screw rod pair two 74, a square drawing part 75 and a circular drawing part 76, the screw rod pair one 73 and the screw rod pair two 74 are respectively threadedly connected at both ends of the bidirectional screw rod 72, a sliding rod 77 parallel to the bidirectional screw rod 72 is fixedly arranged in the drawing box 6, the screw rod pair one 73 and the screw rod pair two 74 are respectively slidingly arranged at both ends of the sliding rod 77, and L-shaped rods 78 are symmetrically fixed at the top of the screw rod pair one 73 and the screw rod pair two 74; The square drawing part 75 is composed of two groups of symmetrically arranged half-rectangular conical cylinders 751, the alloy wire after being processed by the square roller mechanism 5 passes through the half-rectangular conical cylinders 751 to complete the finishing drawing of the square section, one group of the half-rectangular conical cylinders 751 is fixed to the inside of the drawing box 6, and the other group is fixed to one group of the L-shaped rods 78; the circular drawing part 76 is composed of two groups of symmetrically arranged half-circular conical cylinders 761, the alloy wire after being processed by the circular roller mechanism 4 passes through the half-circular conical cylinders 761 to complete the finishing drawing of the circular section, one group of the half-circular conical cylinders 761 is fixed to the inside of the drawing box 6, and the other group is fixed to the remaining L-shaped rods 78; The inner diameters of the half-rectangular conical cylinders 751 and the half-circular conical cylinders 761 gradually decrease along the direction of the alloy wire, the alloy wire after being processed by the roller is uniformly pressed in the radial direction by using the principle of “tapered channel forced shaping”, so as to facilitate the control of the cross-sectional size tolerance; the inside of the drawing box 6 is symmetrically provided with side guide rollers 61, and the drawing box 6 is symmetrically provided with through holes 62 for guiding and passing the alloy wire; the rotating motor 71 is started, the rotation of the output shaft of the rotating motor 71 drives the bidirectional screw rod 72 to rotate, thereby driving the screw rod pair one 73 and the screw rod pair two 74 to move in opposite directions or in the same direction along the sliding rod 77, and then adjusting the opening degree of the half-rectangular conical cylinders 751 and the half-circular conical cylinders 761 through the L-shaped rods 78, so as to facilitate the placement of the alloy wire between the half-rectangular conical cylinders 751 and the half-circular conical cylinders 761 during unfolding.

[0032] As Figures 4-7As shown, the water circulation mechanism 8 includes a cold water machine 81 fixed on the top of the bottom plate 21, a water inlet pipe 82 with a valve and a water outlet pipe 83 with a valve; one end of the water inlet pipe 82 is connected with the bottom of the wire drawing box 6, and the other end is connected with the water inlet of the cold water machine 81; one end of the water outlet pipe 83 is connected with the water outlet of the cold water machine 81, and the other end is fixed on the top of the wire drawing box 6. The low-temperature water provided by the cold water machine 81 flows through the water outlet pipe 83, is injected from the top of the wire drawing box 6, exchanges heat with the rectangular tapered cylinder 751 and the circular tapered cylinder 761 inside the box, and then flows back to the cold water machine 81 from the water inlet pipe 82 at the bottom, so as to efficiently take away the heat generated in the wire drawing process due to friction, avoid the oxidation and discoloration of the silver-plated layer 13 due to high temperature, and save water resources, thereby improving the green environmental protection level of the equipment.

[0033] In specific use, a 6-10 μm thick nickel transition layer 12 is deposited on the surface of the copper-aluminum composite core layer 11 with an approximately rectangular cross section by magnetron sputtering to form a 1.5-3 μm metallurgical bonding interface; then a silver layer with a purity of 99.99% and a thickness of 4-7 μm is deposited on the surface of the nickel layer by electroplating to form a 0.8-1.5 μm diffusion bonding layer, thereby obtaining the wire to be processed.

[0034] When the alloy wire with a circular cross section is needed, the wire is inserted between the two rows of guide roller groups 33 of the guide mechanism 3, is corrected in posture by the guide rollers 34, and is subjected to the alternative and progressive pressing by the horizontal circular pressing roller assembly 41 and the vertical circular pressing roller assembly 42 to complete the preliminary shaping of the circular cross section; the shaped wire enters the wire drawing box 6, the rotating motor 71 is started to drive the bidirectional lead screw 72 to rotate, the circular tapered cylinder 761 is opened, the wire preliminarily shaped is manually guided to pass through the corresponding through hole 62 and the side guide roller 61, is placed in the circular tapered cylinder 761, and the rotating motor 71 is started to reversely rotate to close the circular tapered cylinder 761, so that the finishing wire drawing is performed; during the process, the water circulation mechanism 8 is started to make the low-temperature water of the cold water machine 81 flow through the water outlet pipe 83, be injected into the wire drawing box 6, and flow back from the water inlet pipe 82, so as to continuously take away the processing heat; finally, the finished product with the size precision is drawn out from the through hole 62 of the wire drawing box 6; in the same way, when the alloy wire with a rectangular cross section is needed, the wire is corrected in posture by the corresponding guide roller 34, is subjected to the alternative and progressive pressing by the square horizontal pressing roller assembly 51 and the square vertical pressing roller assembly 52 to complete the preliminary shaping of the square cross section, and is placed in the rectangular tapered cylinder 751 to perform the finishing wire drawing, and the finished product is drawn out from the through hole 62 of the wire drawing box 6.

[0035] The drawing process is controlled by automation, ensuring that the wire is uniformly stressed and the speed is constant in the finishing process, improving the precision and consistency of the finished product size, the cooling system is involved throughout the process, ensuring that the material properties are not affected by temperature rise during the drawing process, the final product surface is smooth and the size is accurate, meeting the strict requirements of high-end electronic and electrical fields.

[0036] The above describes the present application and its embodiments, which are not limited, and the drawings shown are only one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, without creative design, similar structure and embodiments similar to the technical solution should belong to the protection scope of the present application.

Claims

1. A silver-coated copper-aluminum alloy wire comprising a wire body (1) of an alloy, characterized in that: The alloy wire body (1) is provided with a copper-aluminum composite core layer (11), a nickel transition layer (12) and a silver plating layer (13) from inside to outside, and the cross section of the copper-aluminum composite core layer (11) is rectangular.

2. The silver-coated copper-aluminum alloy wire according to claim 1, characterized by: The side length of the cross section of the copper-aluminum composite core layer (11) is 2-3mm; The nickel transition layer (12) is tightly covered on the outer periphery of the copper-aluminum composite core layer (11), the thickness is 6-10μm, and a metallurgical bonding layer is formed between the nickel transition layer (12) and the copper-aluminum composite core layer (11), the thickness of the metallurgical bonding layer is 1.5-3μm; The silver plating layer (13) is tightly covered on the outer periphery of the nickel transition layer (12), the purity is 99.99%, the thickness is 4-7μm, and a diffusion bonding layer is formed between the silver plating layer (13) and the nickel transition layer (12), the thickness of the diffusion bonding layer is 0.8-1.5μm.

3. A silver plated copper aluminium alloy wire pressure roller apparatus for producing a silver plated copper aluminium alloy wire according to claim 1 or 2, comprising a base plate (21), a guide mechanism (3) and a pressure roller mechanism, characterised in that: It also includes a side support plate (22) vertically fixed on the bottom plate (21), the bottom plate (21) is provided with a wire drawing box (6), the wire drawing box (6) is provided with a wire drawing mechanism (7), and the outer side of the wire drawing box (6) is connected with a water circulation mechanism (8).

4. A silver coated copper aluminium alloy wire pressure roller apparatus as claimed in claim 3, wherein: The pressing roller mechanism includes a circular pressing roller mechanism (4) and a square pressing roller mechanism (5), the circular pressing roller mechanism (4) is arranged on one side of the side support plate (22), and the square pressing roller mechanism (5) is arranged on the other side of the side support plate (22).

5. A silver coated copper aluminium alloy wire pressure roller apparatus as claimed in claim 4, wherein: The circular pressing roller mechanism (4) includes a plurality of groups of horizontal circular pressing roller assemblies (41) and a plurality of groups of vertical circular pressing roller assemblies (42); The horizontal circular pressing roller assembly (41) includes a square frame two (411) fixed on the side of the side support plate (22), a servo motor two (412) symmetrically fixed in the square frame two (411), a circular horizontal pressing roller (413) driven by the servo motor two (412) and a support plate one (414) connected to the outer end of the circular horizontal pressing roller (413), the bottom end of the support plate one (414) is fixed on the bottom plate (21), and the output shaft of the servo motor two (412) penetrates the square frame two (411); The vertical circular pressing roller assembly (42) includes a square frame three (421) fixed on the top of the bottom plate (21), a servo motor three symmetrically fixed in the square frame three (421), a circular vertical pressing roller (422) driven by the servo motor three and a support plate two (423) connected to the outer end of the circular vertical pressing roller (422), the bottom end of the support plate two (423) is fixed on the side support plate (22), and the output shaft of the servo motor three penetrates the square frame three (421); The horizontal circular pressing roller assembly (41) and the vertical circular pressing roller assembly (42) are alternately arranged along the alloy wire running direction, the clamping spacing between the horizontal circular pressing rollers in the horizontal circular pressing roller assembly (41) and the clamping spacing between the vertical circular pressing rollers in the vertical circular pressing roller assembly (42) decrease in turn along the alloy wire running direction.

6. A silver coated copper aluminium alloy wire pressure roller apparatus as claimed in claim 5, wherein: The square pressing roller mechanism (5) includes a plurality of groups of square horizontal pressing roller assemblies (51) and a plurality of groups of square vertical pressing roller assemblies (52); The square horizontal compression roller assembly (51) comprises a square frame four (511) fixed to the side of the side support plate (22), a servo motor four symmetrically fixed in the square frame four (511), a square horizontal compression roller (512) driven by the servo motor four, and a support plate three (513) connected to the outer end of the square horizontal compression roller (512), the bottom end of the support plate three (513) is fixed to the bottom plate (21), and the output shaft of the servo motor four penetrates the square frame four (511); The square vertical compression roller assembly (52) comprises a square frame five (521) fixed to the top of the bottom plate (21), a servo motor five symmetrically fixed in the square frame five (521), and a square vertical compression roller (522) driven by the servo motor five, and the output shaft of the servo motor four penetrates the square frame four (511); The square horizontal compression roller assembly (51) and the square vertical compression roller assembly (52) are alternately arranged along the alloy wire running direction; the clamping spacing between the square horizontal compression rollers (512) in the square horizontal compression roller assembly (51) and the clamping spacing between the square vertical compression rollers (522) in the square vertical compression roller assembly (52) gradually decrease along the alloy wire running direction.

7. A silver plated copper aluminium alloy wire pressure roller apparatus (2) as claimed in claim 6 characterised in that: The middle part of the square horizontal compression roller (512) is provided with an arc-shaped groove (53) extending along the circumference thereof.

8. A silver coated copper aluminium alloy wire pressure roller apparatus as claimed in claim 4, wherein: The wire drawing mechanism (7) comprises a rotary motor (71) fixed to the outer side of the wire drawing box body (6), a bidirectional lead screw (72) rotatably arranged in the wire drawing box body (6), a lead screw pair one (73), a lead screw pair two (74), a square wire drawing part (75), and a circular wire drawing part (76); the lead screw pair one (73) and the lead screw pair two (74) are respectively threadedly connected to the two ends of the bidirectional lead screw (72); the wire drawing box body (6) is fixedly provided with a sliding rod (77) parallel to the bidirectional lead screw (72); the lead screw pair one (73) and the lead screw pair two (74) are respectively slidably arranged at the two ends of the sliding rod (77); and the lead screw pair one (73) and the lead screw pair two (74) are symmetrically fixed with L-shaped rods (78) at the top thereof; The square wire drawing part (75) comprises two groups of symmetrically arranged half-rectangular tapered cylinders (751) to form a rectangular tapered cylinder (751); one group of the half-rectangular tapered cylinders (751) is fixed to the inner side of the wire drawing box body (6), and the other group is fixed to one group of the L-shaped rods (78); The circular wire drawing part (76) comprises two groups of symmetrically arranged half-circular tapered cylinders (761) to form a circular tapered cylinder (761); one group of the half-circular tapered cylinders (761) is fixed to the inner side of the wire drawing box body (6), and the other group is fixed to the remaining L-shaped rods (78).

9. A silver coated copper aluminium alloy wire pressure roller apparatus as claimed in claim 8, wherein: The inner diameters of the rectangular tapered cylinder (751) and the circular tapered cylinder (761) gradually decrease along the alloy wire running direction; The wire drawing box body (6) is symmetrically provided with side guide rollers (61) on the inner side thereof, and the wire drawing box body (6) is symmetrically provided with through holes (62).

10. A silver coated copper aluminium alloy wire pressure roller apparatus as claimed in claim 4, wherein: The water circulation mechanism (8) comprises a water chiller (81) fixed on the top of the bottom plate (21), a water inlet pipe (82) with a valve and a water outlet pipe (83) with a valve; One end of the water inlet pipe (82) is connected with the bottom of the wire drawing box body (6), and the other end is connected with the water inlet of the water chiller (81); One end of the water outlet pipe (83) is connected with the water outlet of the water chiller (81), and the other end is fixed on the top of the wire drawing box body (6).

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